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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Directional Ultrasound Source for Solid Materials Inspection: Diffraction Management in a Metallic Phononic Crystal.

Hossam Selim¹, Rubén Picó², Jose Trull¹

¹Physics Department, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, 08222 Terrassa, Spain.

Sensors (Basel, Switzerland)

|November 3, 2020

Summary

This study shows a metallic phononic crystal acts as an ultrasonic lens, focusing elastic waves. This technology offers precise ultrasonic wave control for industrial and medical applications.

Keywords:

NDT acoustic lens phononic crystals self-collimation ultrasonic lens ultrasonic wave diffraction

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Last Updated: Jun 30, 2026

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Published on: November 30, 2012

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Controllable Nucleation of Cavitation from Plasmonic Gold Nanoparticles for Enhancing High Intensity Focused Ultrasound Applications

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Published on: October 5, 2018

Area of Science:

Materials Science
Acoustics
Condensed Matter Physics

Background:

Phononic crystals offer unique wave manipulation properties.
Controlling elastic wave propagation is crucial for various applications.

Purpose of the Study:

To numerically investigate diffraction management of elastic waves in 2D metallic phononic crystals.
To demonstrate the phononic crystal's capability as an ultrasonic lens for wave focusing.

Main Methods:

Numerical simulations were employed to study wave propagation.
The phononic crystal's self-collimation and focusing effects were analyzed.

Main Results:

The 2D metallic phononic crystal acts as an ultrasonic lens, achieving self-collimation and focusing.
These focusing effects are robust across a wide frequency band.
Wave propagation through a coupling gel maintained the focusing properties.

Conclusions:

The developed ultrasonic lens technology enables controlled directivity and focusing of ultrasonic waves.
Potential applications include industrial and medical imaging, and non-destructive testing.
The study validates the concept for precise ultrasonic wave localization.